#!/usr/bin/python
#Filename:using_dict.py

#'ab' is short for 'a'ddress'b'ook
ab = { 'Swaroop' : 'swaroopch@byteofpython.info',
		'Larry' : 'larry@wall.org',
		'Matsumoto' : 'matz@ruby-lang.org',
		'Spammer' : 'spammer@hotmail.com'
		}

print "Swaroop's address is %s" % ab['Swaroop']

#Adding a key/value pair
ab['Guido'] = 'guido@python.org'

#Deleting a key/value pair
del ab['Spammer']

print '\nThere are %d contacts in the address-book\n' % len(ab)
for name, address in ab.items():
	print 'Contact %s at %s' %(name, address)


if 'Guido' in ab: # OR ab.has_key('Guido')
	print "\nGuido's address is %s" % ab['Guido']
